Located at the heart of downtown Atlanta, the construction of Allen Plaza, including 30 Allen Plaza, helped lead to the resurgence of Downtown Atlanta. The development comprises three blocks of a mixed-use development and is named for Ivan Allen Jr., the late Atlanta mayor who played a critical role in bringing the city together and promoting its central business district.
30 Allen Plaza is a 15-story structure that includes eight floors of Class A corporate office space totaling roughly 270,000 sq. ft. The project included 15,584 sq. ft. of retail space and a seven-story, 242,959-sq.-ft., 582-space parking structure.
The exterior of the building is made of a full-curtain wall system featuring stone veneer, polished and thermal granite, precast for coping and ground level pilasters, vision glass and spandrel glass. The lobby features millwork and stone walls, polished metal appointments and marble floors.
The pour-in-place parking deck started with auger-cast foundations on the west end of the building; about two-thirds of the way across, it switched to large spread footings to extend its depth and gain the strength needed. As construction continued, the east end switched to caissons because rock was not found. The project ended up with three different foundation systems in a 40,000-sq.-ft. floor plate. The auger-cast piles on the west end measured as deep as 95-feet, while the caissons on the other only had to extend to 12-feet deep.